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CVE-2019-12468

29
FAUCET Score

CVE-2019-12468 is an Incorrect Access Control vulnerability affecting Wikimedia MediaWiki versions 1.27.0 through 1.32.1. This flaw allows an attacker to bypass re-authentication when directly POSTing to Special:ChangeEmail, potentially leading to account takeover. With a CVSS score of 9.8 (Critical), it has a low attack complexity and can result in complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.27.0, <= 1.32.1CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.43%
Probability of exploitation in next 30 days
EPSS Percentile
87.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0343 is in the 80th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.27.6
composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.30.2
composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.31.2
composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.32.2

Vendor Advisories (1)

composerGHSA-wrhx-3pxr-6vggcritical

Wikimedia MediaWiki Incorrect Access Control vulnerability

May 24, 2022

References

lists.wikimedia.org / pipermail/mediawiki-announce
Third Party Advisory
lists.wikimedia.org / pipermail/wikitech-l/2019-June/092152.html
PatchThird Party Advisory
phabricator.wikimedia.org / T197279
PatchThird Party Advisory
seclists.org / bugtraq/2019/Jun/12
Mailing ListThird Party Advisory
debian.org / security/2019/dsa-4460
Third Party Advisory